Clock for governing damper mechanism



(No Model.)

J. A. LAKIN.

CLOQK FOR GOVERNING DAMPER MECHANISM. I N0. 312,477. PatentedTeb; 17, 1885.

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JAMES A. LAKIN OF \VESTFIELD, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 312,477, dated February 17, 1885.

Application filed Jute C0, 1884. (No model.)

To all whom it may concern:

Be it known that I, JAMES A. LAKIN, a citizen of the United States, residing at NVestfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Clocks for Governing Damper Mechanism, of which the following is 'a specification.

My invention relates to improved time mechanism combined witha clock and with a damper, and adapted to be adjustable independent of the hour-hand wheel of the clock to at predetermined hours operate the damper, the object being to provide improved mechanism for operating the dampersof the furnaces and heaters automatically, and especially those of furnaces that are used in schoolhouses and other public buildings, which are oftentimes unvisited from Saturday until Monday,whereby said dampers are operated to let the draft onto the fire twelve or twenty-four hours, or more, after the apparatus has been set.

This invention is fully illustrated in the ac companying drawings, in which Figure 1 is a front elevation of my invention; Fig. 2, a detached portion of the same, and Fig. 3 a modification of a part.

O is an ordinary cloclghaving the usual dialplat-e hour and minute hands,and arbor upon which they turn.

D is a dial taking the place of the usual alarm-dial of a clock, having its axis coincident to that of the hour and minute hands,and capable of being turned upon its arbor to commence its revolution at any point upon the dial-plate of the clock to complete a revolution in the time it would take the hourhand.

d is an arm upon the dial D.

B is a bar guided to be capable of a vertical reciprocation in the plane of the dial D, provided with notches 0 upon one edge adapted to be engaged by the arm (I, and the notches are spaced at such distance apart upon the bar as to cause the arm clto leave a succeeding notch in position to take the place of the one previously acted upon, and the bar is frictionally held in its guide or guides to maintain its weight. The bar 13 is prolonged from itslowest notch, c, to engage directly or indirectly with a cord-carryin g pulley,E,provided with one or more stops, 9, near its perimeter,

adapted to let off cord enough when released 7 wall contiguous to the bar,adapt the bar to be set to have said numbers indicate the number of notches the bar shall be raised by the arm d before the bar shall release the damper-pulley E, said notches corresponding to twelve hours each elapsing between their successive engagement by the arm d.

In Fig. 1 the bar B is supposed to be set to have the numeral 4 opposite the pointer W,to indicate that in four times twelve hours from the time in which the dial D is put in operative connection with bar B the bar will be moved to release wheel E, the distance upon the bar B between the notchesc corresponding with'the distance between the numbers there'- on, so that the bar need only to be arranged as shown to release the wheel at the end of its prescribed movement.

In Fig. 1 alongitudinal opening, b,is shown in bar B,of alength equal to the maximum distance required of the bar to move,and adapted to have its lower end at the extreme of its upward movement come against the pin it. The pin w extends through openingb from one end of a latch, I, hinged at its other to the case or wall at i.

Intermediate to the hin'gei and pin win the latch I is a notch, m, which catches by the weight of the latch over a pin, 9, of wheel E.

It will be seen that when thelatch is tripped by the bar B the wheel E is released and the damper H suffered to drop. The latch I is further adapted, as shown, to permit the wheel E to wind up the cord h without opposition therefronn'said wheel being turned by any suitable handle thereon to the right in Fig. 1, thereby drawing cord it up and opening the damper again. When wheel E has been so turned, bar B is moved down, letting latch I again engage on a pin, 9, as before. The bottom notch,c, in the bar is enlarged,as seen, to permit the arm (1, when it shall have reached said notch,to revolve without further As a modification of the latch Loperated by the slot end of b of bar B, the wheel shown in Fig. 3 is provided with pins 9 at right angles to its face, and the bar guided to have only a vertical movement moves over the face of the wheel to have a pin bring up against one of its edges, the wheel E being released when the bar is lifted above said pin By these means I am able to cause a damper to be operated at any desired hour of the .twelve ahead,or any multiple thereof.

Now having described my invention,what I claim is 1. In 'a damper -governing mechanism, a clock provided with a damper-dial adjustable independently of the hour-hand wheel, having an arm thereon projecting from its periphery, and a sliding bar having notches in its edge, located near the periphery of the dial and capable of being adjusted to diflerent positions relative to thelatter to permit sa d arm to en gage therewith, whereby the bar is given an intermittent sliding motion, combined and operating substantially as set forth.

2. In damper-governing mechanism, a clock provided with a damper-dial adjustable independently of the hour-hand wheel, a sliding bar capable of being set at different positions relative to said dial and of engagement with the latter, a wheel,substantially as shown and described,having a cord-connection for dampers, and mechanism,substantially as shown and described,for connecting said bar and wheel.

3. In damper-governing mechanism, a clock provided with a damper-dial adjustable independently of the hour-hand wheel, a sliding bar capable of being set at different positions relative to said dial and to engage therewith, a cord-storing wheel, and a wl1eel-hook,substantially as shown and described, adapted to be operated by said bar to release the wheel.

JAMES A. LAKIX.

Witnesses:

Asa P. RAND, ROBERT H. KNEIL. 

